Re: Compiling file with subroutines using gfortran

[Hans Lonsdale <hanslonsdale@mailfence.com>]

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January 1, 2023 at 2:32:49 PM CET Jonathan Wakely <jwakely.gcc@gmail.com> wrote:

On Sun, 1 Jan 2023, 12:01 Patrick Begou via Gcc-help, <gcc-help@gcc.gnu.org> wrote:

You are using a wrong option that may overwrite your fortran source file 
with the result of the compilation..
To create only the .o file use:

gfortran -O3 -ffree-form*-c*  myfile.f

or, f you want:

gfortran -O3 -ffree-form*-c*  myfile.f*-o myfile.o*

This markup doesn't really help in plain text rendering.

The file is not complicated, I just have defined an array and a recursive subroutine.

implicit none
integer, parameter :: prec=kind(1d0), i64=selected_int_kind(15)

integer, parameter :: L(0:43) = (/                     &
 1, 1, 3, 5, 9, 15, 25, 41, 67, 109,                   &
 177, 287, 465, 753, 1219, 1973, 3193, 5167, 8361,     &
 13529, 21891, 35421, 57313, 92735, 150049,            &
 242785, 392835, 635621, 1028457, 1664079, 2692537,    &
 4356617, 7049155, 11405773, 18454929, 29860703,       &
 48315633, 78176337, 126491971, 204668309, 331160281,  &
 535828591, 866988873, 1402817465 /)

recursive subroutine quicksort (array)
 real(prec), intent(inout) :: array(:)
 real(prec) :: temp, pivot
 integer :: i, j, last, left, right

 last = size (array)
end subroutine quicksort

 

it will do the same thing.

Patrick

Le 01/01/2023 à 09:52, Hans Lonsdale via Gcc-help a écrit :
>
> I want to compile a file containing a number of subroutines.
>
> I am using the command
>
> gfortran -O3 -ffree-form -o myfile.f
>
> But getting problems with recursive and END PROGRAM statement.
>
> All I want is making the object file.
>
> 44 | recursive subroutine quicksort (array)
>        | 1
> Error: Unclassifiable statement at (1)
> myfile.f:112:3:
>
>    112 | end subroutine quicksort
>        |   1
> Error: Expecting END PROGRAM statement at (1)
> myfile.f:122:35:
>
> Have done
>
> gfortran -O3 -ffree-form -o myfile.f
>
> The command is supposed to make the object file, but I get errors with END PROGRAM declaration.
>
>

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